str = "day day up"
for i in range(len(str)):
    print(str[i],end=" ")

list1 = []
list1[0] = 1
list1[1] = 2
list1[2] = 3
list1[3] = 4
list1[4] = 5
list1.append(3)
list1.append(5)
print(list1)

list2 = [1,2,3]
list3 = list()
list.append(1)
list.append(2)
list.append(3)
print(list3)

list2 = [1,2,3]
for i in list2:
    print(i)
list2.insert(1,10)
print(list2)
list2.extend([11,12])
print(list2)
# list2.sort() #默认升序
# print(list2)

list3 = sorted(list2)
print(list2)
print(list3)
# del list3
# print('++++++++')
# print(list3)

#1-10
list5 = [i**2 for i in range(1,10) if i%2 !=0]
print(list5)

str = ('1111',)
print(type(str))